Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Rev. No:
Rev. Date:
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-71-02
3
06.11.2013
23
46
1
25.08.2014
Table 71-16a Troubleshooting / Electrical System / FADEC
code Indication
Code Task / Check
Check by
Corective Action
Electrical System / FADEC
41
Erroneous
indication
41.1
Check corresponding
connector and wires /
wiring harness
Refer to instructions for harness
troubleshooting
41.2 Measure sensor
Refer to instructions for
measuring sensor operation
42
Multiple sensor
failure
displayed by
FADEC
42.1
Check 5V supply of
FADEC
Connect FEADEC Service Tool.
Verify "Vref" is 5V
If 5V supply is less than 5V, check
harness / connectors for short
circuit (including unusedPFuel and
Pgear connectors). Check supply
voltage of each FADEC while
each FADEC is active (use
FADEC B). If supply voltage drops
for both FADEC-halfs while active,
check harness. If voltage for one
FADEC is satisfactory
while it is
active, while voltage from other
FADEC is not satisfactory
,
replace FADEC.
43
No display on
instruments
43.1
Verify that CAN
termination plug is
installed
Install CAN termination plug
44
Engine will not
perform
FADEC test
44.1
Ensure engine is
operating on
FADEC A
Connect FADEC Service Tool,
check which "FADEC active" lamp
is illuminated.
Cycle FADEC power, reset
warnings if necessary.
Verifying crank signal on both
FADEC-halfs using TAE service
software tool. Proceed to Code
45, "Faulty Crank Signal"
45
Faulty crank /
cam signal
45.1 Check connector
Inspect connector for damage.
Inspect connector pins for
deformation. Inspect wires for
damage.
Refer to instructions for damaged
connector / harness
45.2
Inspect crank / cam
sensor. Check sensor
for damage
Remove sensor from crankcase /
cylinder head. Inspect sensor for
damage or contamination.
Clean sensor. Replace if it´s
damaged
45.3
Check sensor
clearence (crank sensor
only)
Measure sensor clearence, verify
within Repair Manual tolerances
Содержание Cessna 172
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